13 Field frequency distribution
This analysis reveals the relative importance of some fields. Pareto’s distribution is a kind of power law distribution, and Pareto-rule of 80-20 rules states that 80% of outcomes are due to 20% of causes. In catalogue outcome is the total occurrences of the data element, causes are individual data elements. In catalogues some data elements occurs much more frequently then others. This analyses highlights the distribution of the data elements: whether it is similar to Pareto’s distribution or not.
It produces charts for each document type and one for the whole catalogue showing the field frequency patterns. Each chart shows a line which is the function of field frequency: on the X-axis you can see the subfields ordered by the frequency (how many times a given subfield occurred in the whole catalogue). They are ordered by frequency from the most frequent top 1% to the least frequent 1% subfields. The Y-axis represents the cumulative occurrence (from 0% to 100%).
Before running it you should first run the completeness calculation.
With a bash script
catalogues/[catalogue].sh paretoor
./qa-catalogue --params="[options]" paretooptions: